/* reset */
/**, *::before, *::after {*/
/*  margin: 0;*/
/*  padding: 0;*/
/*  box-sizing: border-box;*/
/*}*/
/*html, body {*/
/*  height: 100%;*/
/*}*/

/* content */
#canvas {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}